
how to build a block doing dynamic FFT ? 2 messages
#FFT
Hello Ericsson I'll start with saying that it's pointless to try and build a dynamic [CDF]FT in LTspice, unless curiosity is at stake. In which case you should know you won't achieve what you think yo
Hello Ericsson I'll start with saying that it's pointless to try and build a dynamic [CDF]FT in LTspice, unless curiosity is at stake. In which case you should know you won't achieve what you think yo

By
Vlad
·


How to normalize any plot in one step 4 messages
#FFT
James, In the FFT, 0 dB corresponds to 1.414 V peak, not 1 V. Therefore you need to scale your signal to 1.414 V (1.0 V RMS). You can also scale your signals in the waveform plot window after the FFT
James, In the FFT, 0 dB corresponds to 1.414 V peak, not 1 V. Therefore you need to scale your signal to 1.414 V (1.0 V RMS). You can also scale your signals in the waveform plot window after the FFT

By
Andy I
·


Problem getting OIP3, third order intermodulation intercept point from two tone test of transistor amp. 19 messages
#FFT
Yes, the harmonic balance option does work in QucsStudio, but it is really very limited compared to Microwave Office, for example. Sadly, harmonic balance was never really fixed in Qucs itself. I real
Yes, the harmonic balance option does work in QucsStudio, but it is really very limited compared to Microwave Office, for example. Sadly, harmonic balance was never really fixed in Qucs itself. I real

By
Tony Casey
·


dotmeasfreq.asc and calculation of total harmonic distortion 17 messages
#FFT
ak za wrote: "i did what you had say. when the diodes are there, all things are ok. but after eliminating them, in log file the below massages are written: measurement "Period" FAIL'ed measurement "Fr
ak za wrote: "i did what you had say. when the diodes are there, all things are ok. but after eliminating them, in log file the below massages are written: measurement "Period" FAIL'ed measurement "Fr

By
Andy I
·


FFT Equal Spaced Samples 48 messages
#FFT
Vlad, I wasn't suggesting any disagreement. I merely meant to convey that I made some arbitrary choices (that may not have been optimum) because time was constrained. Your suggestion make sense. But w
Vlad, I wasn't suggesting any disagreement. I merely meant to convey that I made some arbitrary choices (that may not have been optimum) because time was constrained. Your suggestion make sense. But w

By
Tony Casey
·


.four with stepped frequency voltage source and .tran 6 messages
#FFT
Hello MDM, I forgot to mention that you should turn off data ompression for good results and you should specify a small time step in .TRAN. .options plotwinsize=0 Helmut
Hello MDM, I forgot to mention that you should turn off data ompression for good results and you should specify a small time step in .TRAN. .options plotwinsize=0 Helmut

By
Helmut Sennewald
·


#questions Where is FFT. FFT is not in the view menu. 2 messages
#FFT
How to find FFT: 1) Run a .TRAN simulation. 2) Plot a waveform. 3. Go to the plot window, then rightclick > View > FFT. At this point you have a popup window. To start with, just accept all the defa
How to find FFT: 1) Run a .TRAN simulation. 2) Plot a waveform. 3. Go to the plot window, then rightclick > View > FFT. At this point you have a popup window. To start with, just accept all the defa

By
Andy I
·


#questions #FFT 11 messages
#FFT
Hi Helmut Sennewald Yes, that is the point that I need, finally, I can plot the curve in Matlab. Thank you so much. Thanks, everyone for your help. Thanks and, Best regards! Tin
Hi Helmut Sennewald Yes, that is the point that I need, finally, I can plot the curve in Matlab. Thank you so much. Thanks, everyone for your help. Thanks and, Best regards! Tin

By
Jack
·
